<template>
  <div class="login">
    <div class="login_container">
      <div class="login_box">
        <!-- 头像区域 -->
        <div class="avatar_box">
          <img src="../assets/logo.png" />
        </div>
        <!-- 表单区域 -->
        <el-form
          ref="loginRef"
          :model="form"
          :rules="loginRules"
          class="login_form"
          label-width="0px"
        >
          <!-- 用户名 -->
          <el-form-item prop="username">
            <el-input
              v-model="form.username"
              prefix-icon="el-icon-user-solid"
              placeholder="请输入用户名"
            ></el-input>
          </el-form-item>
          <!-- 密码 -->
          <el-form-item prop="password">
            <el-input
              v-model="form.password"
              prefix-icon="el-icon-s-cooperation"
              placeholder="请输入密码"
              type="password"
            ></el-input>
          </el-form-item>
          <!-- 按钮区域 -->
          <el-form-item class="btns">
            <el-button type="primary" @click="login">登录</el-button>
            <el-button type="info" @click="resetLogin">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //这是登录表单的数据绑定对象
      form: {
        username: "admin",
        password: "123456",
      },
      //这是表单验证
      loginRules: {
        //验证用户名是否合法
        username: [
          { required: true, message: "请输入登录名称", trigger: "blur" },
          { min: 3, max: 10, message: "长度在3到10之间", trigger: "blur" },
        ],
        //验证密码是否合法
        password: [
          { required: true, message: "请输入密码", trigger: "blur" },
          { min: 6, max: 15, message: "长度在6到15之间", trigger: "blur" },
        ],
      },
    };
  },
  methods: {
    //点击重置按钮
    resetLogin() {
      this.$refs.loginRef.resetFields();
    },
    login() {
      this.$refs.loginRef.validate((res) => {
        if (res == true) {
          this.axios.post("login", this.form).then((res) => {
            console.log(res)
            if (res.data.meta.status !== 200) return this.$message.error("登录失败");
            this.$message.success("登录成功");
            // 1、将登陆成功之后的token, 保存到客户端的sessionStorage中; localStorage中是持久化的保存
            //   1.1 项目中出现了登录之外的其他API接口，必须在登陆之后才能访问
            //   1.2 token 只应在当前网站打开期间生效，所以将token保存在sessionStorage中
            window.sessionStorage.setItem("token", res.data.data.token);
            // 2、通过编程式导航跳转到后台主页, 路由地址为：/home
            this.$router.push("/home");
          });
        } else {
          alert("请输入合法的用户名或者密码");
        }
      });
    },
  },
};
</script>
<style>
.login {
  height: 100%;
}
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.avatar_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: #ddd;
  position: relative;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
}
.avatar_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eee;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  box-sizing: border-box;
}
</style>
